Yea, homeowner grade is my impression of all Briggs stuff. The Subaru engine was nice. I originally got the first generator on sale for $450 (down from $600), so the even swap credit on the $799 Briggs sounds like a good deal (on the surface). I still think the Powermate was a better generator, even though it listed for $200 less.
AFAIK, all engines are sensitive to ethanol and old gas, at least that's my experience. I have a dozen motorcycles in storage-mode, the little ones are the worst when it comes to old fuel. I keep all of my machines stored with fresh oil and a completely dry fuel system. When I pull them out, everything always starts right up even after sitting for years.
JayC